Improvement in forming metallic cases for cartridges, caps



S. W. WUD.

etalii Cases fur Cartridges, Gaps, @1C- Forming Patented Oct. 28,1873.

UNITED STATES PATENT OFFICE.

STEPHEN W. WOOD, OF CORNWALL, NEW YORK.

IMPROVEMENT IN'FORMING METALLIC CASES FOR CARTRIDGES. CAPS. Src.

Specification forming part of Letters Patent N o. 144.010, dated October 28, 1873; application filed April 17, 1873.

To all whom it may concern:

Be it known thatI, STEPHEN W. WOOD, of Cornwall, county of Orange and State of New York, have invented an Improved Metallic Oase for a Cartridge, and process of making the same and other articles; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings making part of this speciflcation- Figure l representing, in section, a form upon which the case for a cartridge is produced exteriorly; Fig. 2 showing, in section, a form of mold, within which the case for a cartridge is produced interiorly; Fig. 3 representing, in section, a modication of Fig. l; Fig. 4 being a sectional view of a case for a percussion-cap removed from the form.

Like letters designate corresponding parts in all of the iigures.

Metallic cases for cartridges and other articles have heretofore been made from sheets of rolled metal of the required thickness, and formed into shape by means of punches and dies, or have been cast in molds.

The nature of my invention consists in forming cases for cartridges by electro-deposition of the metal composing it upon or in a form or mold of the required size and shape, and other articles in like manner.

The form or mold A may be, as represented in Fig. l, prepared for depositing the metal on the exterior surface, which has the form and size required for the interior of the cartridge-case. If made of metal, it is shaped and finished smooth, and then coated with plumbago or otherwise prepared, so as to prevent the adhesion thereto of the deposited metal composing the cartridge-case. It is then immersed in an electro-depositing bath, and allowed to remainthere till the deposit ofthe copper or other metal is sufficient to give the required thickness to the case.

The case maybe formed of the required length and diameter by the deposition of the metal, or it may be first made somewhatA larger, and afterward reduced in diameter and length to the exact size desired, and shaped to receive the various percussions for exploding the charge of powder.

If formed as in Figr, an indentation and anvil to receive, and upon which to explode, the percussion-cap; also, a ange or rim, by which it may be withdrawn from the chamber of the gun, may be formed on the `closed end afterward, or the ilange deposited thereon in the bath, as in Figs. 2 and 3; or the case may be deposited on the interior surface of a form or mold, A, Fig. 2, which has the exact interior diameter and form to be given to the case a,- and the metal of the bath is deposited 011 the interior surface to the required thickness. It is then removed from the mold, and needs no further nishing.

The interior surface of the mold is prepared in the same way as described above, by covering it in any manner with a coating or substance to prevent adhesion of the metal deposited. p I.

If the case is tapered, or has a head, b, the mold A is formed of two or more pieces, f g, and joined together so as to allow of the removal of the case therefrom.

Percussion cap and primer cases are made in the same way, which is applicable to a great variety of other articles which I claim the manufacture of as part of this invention.

Ilaving thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is-

' l. The process of forming metallic cases for cartridges and other articles by the electrodeposition of the metal of which it isI composed, substantially as herein specified.

2. A metallic case for a cartridgeforlned by the electro-deposition of the metal of which it is composed, as a new article of manufacture.

Witnesses: STEPHEN W. `WOOD.

GEO. P. BAETLE, E. M. GALLAHER. 

